One Friday morning Chen Hua gets up late. When he gets to the door of the classroom, Mr. Gao, his math teacher says, "You are1again. Now how many times are you late this week?" "Three times." "Why are you late2class?" "Because I get up late." "Why don't you go to bed3?" asks the teacher.

    "It isn't my fault(过错), Mr. Gao. The TV play is over4about eleven." answers Chen Hua." Now, please5me your homework." says the teacher.

    "I'm sorry, I can't do it." "Why don't you do it?" asks the teacher.

    "Because the first part of the homework is6easy. I don't think I need to do it. The second part is too difficult7me to do it. I can't8it out. So I don't do it."

    Jenny was on the way to the school library. She wanted to return books and1some new ones. She likes2so much. When she got to the3and opened her bag, she found the4were not in it. She looked for them again, but she5couldn't find them. She was a little6. She ran back to the7and looked for them in the classroom. The result was the same. "What can I do? The books are8" She almost began to cry. At that time, she thought of the 'Lost and Found Office' (失物招领处). She ran there and9the books. She smiled. "Oh, my God! I should be10next time."

— What does this sign mean?

— It means, "No smoking".

— Can you see that （标志）?